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Products 
High strength bolt grade 8.8 external hexagonal screw grade 10.9 bolt screw grade 12.9 full and half button hexagonal s
Bolts made of high-strength steel or requiring large preload can be called high-strength bolts. High strength bolts are mostly used for the connection of bridges, rails, high-voltage and ultra-high voltage equipment. The fracture of this kind of bolt is brittle fracture.
High strength bolts applied to ultra-high pressure equipment need to be prestressed to ensure the sealing of the container.
